Preheat oven to 400℉
Place prepared pie shell into a 9" pie pan and prick the bottom and sides of the pie shell. Bake for about 15 minutes, or until the pie crust just begins to get a golden color. Remove pie crust and set aside to cool to room temperature. Reduce oven temperature to 325℉. Mix 1/2 tsp Asian chili sauce (hot), 1 1/2 cup heavy cream, and 4 large eggs in a medium mixing bowl. Whisk the mixture with a whisk until fully combined.
When the pie crust has cooled slightly, spread 2 whole thinly sliced spring onions on the bottom of the pie crust, then spread half of the smoked ham on top of the onions. Add 3/4 cup grated Gruyere or cheddar cheese on top of the ham, then spread the remaining ham on top of the cheese.
Pour the egg/cream mixture over the ham and cheese mixture, pouring to cover the surface completely.
Place quiche into a preheated oven and bake for 30-40 minutes or until the center has set and an the top has turned a golden color.
Allow to cool for about 10 minutes, then slice and serve.
